Although virtually all single-unit range-oven-broiler systems made for home use are either the all-gas or all-electric variety, you can buy a gas range and electric oven-broiler unit separately. The first snugly fits into a hole cut into your counter. The second is installed in a wall cabinet or under a counter (but not directly under the separately installed range because of space limitations). Go for the dual system the next time you remodel your kitchen.